Epsillon writes: The Register reports on a phenonmenon most users will be familiar with: Computer half-life.

"Five years ago, we activated a dozen new, freshly-purchased systems," said Computer Science Professor Asteio Artikolos. "Since then we have measured, on average, a 10-15 per cent reduction in the machines' clock speeds over that time. It's as if each machine's stock of megahertz were somehow leaking away."